CONTACTLESS POWER FEEDING SYSTEM, POWER TRANSMITTING DEVICE, AND POWER RECEIVING DEVICE

Document Type and Number:

WIPO Patent Application WO/2016/103354

Kind Code:

A1

Abstract:

A magnetic field resonance-based contactless power feeding system 1, wherein stable supplying of electric power from a power transmission device 10 to a power reception device 20 is enabled while a target power transmission efficiency is maintained. The power reception device 20 is provided with: an adjustment coil 212 that is disposed in an internal space of a power reception coil 211 such that the winding axis direction thereof rotates about the winding axis direction of the power reception coil 211; and an angle adjustment mechanism 24 for adjusting an angle θ1 formed by the winding axis direction of the power reception coil 211 and the winding axis direction of the adjustment coil 212 so that the power transmission efficiency is maintained at a target value while electric power is being supplied. The power transmission device 10 is provided with: an adjustment coil 112 that is disposed in an internal space of a power transmission coil 111 such that the winding axis direction thereof rotates about the winding axis direction of the power transmission coil 111; and an angle adjustment mechanism 14 for adjusting the angle θ2 formed by the winding axis direction of the power transmission coil 111 and the winding axis direction of the adjustment coil 112 so that the power transmission efficiency is maintained at the target value while electric power is being supplied.